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Seeing Is Believing - The Human Eye

written by: pantera182
 
Whether you stare or simply take a quick glimpse, your eyes serve an irreplaceable function. And further more, they are beautiful! Haven't you noticed?

Question 1:


What is the main function of the iris of the eye?
It protects the sclera from injuries.
It protects the lens from injuries.
It controls the amount of light that reaches the retina.
All of these

Question 2:


Where exactly is the retina of the eye positioned?
It's lining the inner surface of the eye.
Retina is a synonym of pupil.
Along the optic nerve.
Right behind the pupil

Question 3:


What part of the eye is usually referred to as 'the white of the eye'?
Sclera
All of these
Conjunctiva
Stroma

Question 4:


The cornea of the eye is the transparent front part that covers the iris, pupil, and anterior chamber. Which of these statements is true about the cornea?
Touch of the cornea provokes an involuntary reflex to close the eyelid.
It refract most of the light that enters the eye.
The cornea does not have blood vessels.
All of these

Question 5:


Why is the pupil of the eye black ?
It contains black pigments.
The tissue right behind the pupil is black.
All of these
Most of the light that enters the pupil is absorbed by the tissues inside the eye.

Question 6:


Conjunctivitis, referred to as "pink eye", is an inflammation of the conjunctiva of the eye. What may be the cause of such inflammation?
All of these
Viral infection
Allergic reaction
Bacterial infection

Question 7:


Which of the following statements is true about the eyelids?
The skin of the eyelids contains more pigment cells compared to the rest of the skin on the body.
All of these
The skin of the eyelids is one of the thinnest skin of the whole human body.
They protect the eye from drying out and from foreign objects.

Question 8:


At what stage of the development of the fetus do eyelashes form?
Around the 20th week
Between the 13th and 14th week
Between the 7th and 8th week
Around the 26th week

Question 9:


Which of these is a medical term that refers to crying?
Humoring
Lacrimation
Lactation
Blepharitis

Question 10:


The average size of a normal human eye is commonly compared to the size of this object.
Walnut
Golf ball
Apricot
Cherry tomato

 


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